Surveying
With the rise of temperature, the sensitivity of a bubble tube

increases
None of these
decreases
remains unaffected

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Surveying
Homologous points are

Corresponding points on the ground and photograph
Opposite corners of a photograph
Nodal points of the camera lens
Plumb points of stereo pair of photographs

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Surveying
Systematic errors

Always follow some definite mathematical law
Are also known as cumulative errors
Can be removed by applying corrections to the observed values
All listed here

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